java - 如何修复我的脚本以按正确顺序运行？

Question

程序应该返回

The test scores in descending order are: (Scores) The average is (average)

我收到的结果是

The average is (average) The test scores in descending order are: (Scores)

如何修复它以获得正确的返回

import java.util.Scanner;

public class Average
{
    private int[] data;
    private double mean;

    public Average()
    {
        data = new int[5];
        int number = 0;
        int Temp = 0;
        String[] Scores = new String[5];
        Scanner keyboard = new Scanner(System.in);

        for(int index = 0; index < data.length; index++)
        {
            number++;
            System.out.print("Enter test score #" + number + ":");
            Temp = keyboard.nextInt();
            data[index] = Temp;
        }

        selectionSort();
        calculateMean();
    }

    public void selectionSort()
    {
        int n = data.length;

        for(int index = 0; index < n-1; index++)
        {
            int min_idx = index;
            for(int j = index+1; j < n; j++)
                if(data[j] >= data[min_idx])
                    min_idx = j;

            int temp = data[min_idx];
            data[min_idx] = data[index];
            data[index] = temp;
        }
    }

    public String toString()
    {
        String MyScore = "Your test scores in descending order are: " +     "\n";

        for(int index = 0; index < data.length; index++)
        {
            MyScore += data[index] + " ";
        }
        return MyScore;
    }

    public void calculateMean()
    {
        int Sum = 0;
        int Mean = 0;

        for(int index = 0; index < data.length; index++)
        {
            Sum += data[index];
        }
        Mean = Sum/data.length;
        System.out.println("The average is " + mean);
    }
}

为了使这项工作成功，我必须交换什么？

编辑:此文件中使用了 Average 类

public class AverageDriver
{
    public static void main(String[] args)
    {
         Average MyScores = new Average();
        System.out.print(MyScores);
    }
}

Answer 1

您应该仅在调用 toString() 之后调用 calculateMean()。
所以你可以修改构造函数

selectionSort();
System.out.println(toString());
calculateMean();

或仅在构造函数中调用 selectionSort();，然后在 main 中调用

public class AverageDriver
{
    public static void main(String[] args)
    {
         Average myScores = new Average();
         System.out.print(myScores);
         myScores.calculateMean();
    }
}

顺便说一句，你应该使用小写的变量名称，这将修复 calculateMean() 中的错误:你正在调用 System.out.println("Theaverage is "+ Mean); 但变量是 Mean。